All of this happens in a split second. It's simply not possible, in the evidenced time frame, to fire one shot in self defense and then realign and fire two more with murderous intent. It is also not at all plausible that the position of the two individuals could have changed that much in between the shots. It's also very clear in other video that the officer has been struck and his balance severely disturbed; it takes considerable time for him to recover and he has very clearly fired all three shots before he has properly stood up.

In short, other video evidence clearly rules out any possibility that "he had stepped aside". And we can see the relative timing of when the SUV's wheels start to spin, too, even in the video from behind the SUV where Good is obscured from view by the other officer.